At present, the common building drainage pipes in urban construction in China are PVC pipes, which use resin as the raw material and additives, and are extruded to form pipes. Although the service life of the material is prolonged, the material will experience aging under the combined influence of stress medium, temperature, and oxygen. The most specific manifestation is that the strength of the material will decrease with the increase of service time. Due to the widespread use of PVC in China, quality testing standards and specifications have been established for many years, and there are now complete product standards and inspection methods
Technical indicators
When testing the pipe in the laboratory, the drainage pipe has specific technical requirements such as color, appearance, specifications, and physical properties. According to relevant specifications, the Vicat softening temperature of drainage pipes must be ≥ 79 ℃. In normal use environments, the longitudinal shrinkage rate should be controlled at ≤ 5%, and the TIR value of the drop hammer impact test should be ≤ 10%. Of course, these are all basic quality parameters. In the actual use process, designers and construction parties also need to consider various influencing factors such as external climate, temperature, and usage location based on the actual situation on site, and make appropriate selection of this standard specification
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsBaijian and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered, meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing, with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China